Polished Marble Bar Chert MB110 Rough rock Alcheringa narrina from the Archaean

Alcheringa narrina from the Archaean Meentheena Member within the Tumbiana Formation

Weight  is 456 grams

Weighs: 201 grams

Dimensions at widest points approximately 100 mm x 45 mm  x 8

Weighs 207 grams

Polished Marble Bar Chert MB110 Rough rock Alcheringa narrina from the ArchaeanMB110 Marble Bar Chert. Cut and polished on one side with a rough, natural back. Dimensions at widest points approximately 110 mm x 55 mm x 45 mm thick. Weighs 339 grams. Marble Bar chert is a finely banded, iron rich silica rock from the Marble Bar Chert Member (Warrawoona Group) of Western Australia. Formed in shallow Archean seas, it dates to the Paleoarchean (~3. 46 billion years old), making it one of the Earths oldest well preserved sedimentary